Weidmueller VPU AC I 4 R 300/12.5

The VPU AC I 3+1 R 300/12.5 is a voltage protection unit for AC systems. The "3+1" likely indicates three primary protection stages and one additional stage, providing enhanced security. The "R" could signify a reset function or a special protection feature. "300" refers to the voltage or power capacity, and "12.5" may represent a current rating or operational parameter. This unit is designed to protect electrical equipment from voltage fluctuations, commonly used in industrial or commercial settings.